VERTEBRATE PALAEONTOLOGY IN 1914 621 



interesting and valuable specimen was presented in the autumn 

 of 1914 by Mrs. Bull, the widow of the original owner, to the 

 Natural History Branch of the British Museum. It may be 

 added that Pliolophus is now known to be identical with Hyraco- 

 t/ierium, a genus described by Owen himself at an earlier period, 

 and one of the forerunners of the horse-line. 



The evolution of the great primitive American Tertiary 

 perissodactyles of the family Titanotheriidce has continued to 

 engage the attention of Prof. H. F. Osborn, who has published 

 a short paper on the subject in the Bull. Geol. Soc. America, 

 vol. xxv. pp. 403-5, in which certain modifications are made 

 in his earlier phylogenetic scheme. On page 4.06 of the same 





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A 



Fig. 2. — Restoration of the earliest and latest Titanotheres — Eotitanops (a) 



and Brontotheriuf/i (b). 

 (From Osborn, Bull. Geol. Soc. America.) 



issue he gives restorations, to scale, of the earliest and latest 

 representatives of the group, namely Eotitanops of the Lower 

 Eocene Wind River beds, and Brontotherium of the Oligocene 

 White River horizon. Compared with the former, the latter 

 shows an advance in specialisation and bodily size (fig. 2) 

 analogous to that between the modern horse and the Eocene 

 Hyracotherium. Alike from the stratigraphical and the systematic 

 point of view, a finely preserved palate of a rhinoceros from the 

 Upper Miocene Maeotic strata of the Odessa district, described 

 and figured by Mr. E. Kiernik in the Bull. Ac. Sci. Cracovie 

 for 1913, pp. 808-64, pi. lxviii. (1914), is of more than ordinary 

 interest. It is allied to Aceratherium blanfordi of the Bugti beds 



4i 



